Hydration Characteristics and Immobilization of Cr (VI) in Slag Cement-CKD Pastes under Hydrothermal Treatment

The effect of hydrothermal curing regimes on the hydration characteristics of slag cement containing different ratios of cement kiln dust has been studied. The samples for this study were combination of slag cement and cement kiln dust (5%-25%) without and with immobilization of 5% Cr (VI) by mass....

Full description

Bibliographic Details
Main Authors:	Shatat, M. R., Ali, Gomaa A. M., Tantawy, M. A.
Format:	Article
Language:	English
Published:	Springer 2015
Subjects:	QD Chemistry
Online Access:	http://umpir.ump.edu.my/id/eprint/14165/ http://umpir.ump.edu.my/id/eprint/14165/ http://umpir.ump.edu.my/id/eprint/14165/ http://umpir.ump.edu.my/id/eprint/14165/1/fist-2015-gomaa-Hydration%20Characteristics%20and%20Immobilization.pdf

id	ump-14165
recordtype	eprints
spelling	ump-141652016-08-25T04:06:43Z http://umpir.ump.edu.my/id/eprint/14165/ Hydration Characteristics and Immobilization of Cr (VI) in Slag Cement-CKD Pastes under Hydrothermal Treatment Shatat, M. R. Ali, Gomaa A. M. Tantawy, M. A. QD Chemistry The effect of hydrothermal curing regimes on the hydration characteristics of slag cement containing different ratios of cement kiln dust has been studied. The samples for this study were combination of slag cement and cement kiln dust (5%-25%) without and with immobilization of 5% Cr (VI) by mass. Pastes were hydrothermally treated at 180 °C for different periods (2-24 h) in well closed stainless steel capsule. The hydration characteristics of these pastes were studied by measuring the compressive strength, bulk density, total porosity and combined water content. The findings were further supported by XRD and SEM analysis. The results indicated that the hydration characteristics of slag cement paste containing cement kiln dust 10% by mass were enhanced, especially at later ages (24 h) of hydration. That is due to the hydrothermal curing regimes of immobilized pastes accelerating hydration reactions and precipitation of CaCrO4, indicating that Cr (VI) can be solidified in the cement paste. This precipitation leads to pore formation in hydrated slag cement pastes. Springer 2015 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/14165/1/fist-2015-gomaa-Hydration%20Characteristics%20and%20Immobilization.pdf Shatat, M. R. and Ali, Gomaa A. M. and Tantawy, M. A. (2015) Hydration Characteristics and Immobilization of Cr (VI) in Slag Cement-CKD Pastes under Hydrothermal Treatment. Journal of Wuhan University of Technology-Mater. Sci. Ed., 30 (5). pp. 1013-1019. ISSN 1000-2413 (Print); 1993-0437 (Online) http://dx.doi.org/10.1007/s11595-015-1266-7 DOI: 10.1007/s11595-015-1266-7
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	QD Chemistry
spellingShingle	QD Chemistry Shatat, M. R. Ali, Gomaa A. M. Tantawy, M. A. Hydration Characteristics and Immobilization of Cr (VI) in Slag Cement-CKD Pastes under Hydrothermal Treatment
description	The effect of hydrothermal curing regimes on the hydration characteristics of slag cement containing different ratios of cement kiln dust has been studied. The samples for this study were combination of slag cement and cement kiln dust (5%-25%) without and with immobilization of 5% Cr (VI) by mass. Pastes were hydrothermally treated at 180 °C for different periods (2-24 h) in well closed stainless steel capsule. The hydration characteristics of these pastes were studied by measuring the compressive strength, bulk density, total porosity and combined water content. The findings were further supported by XRD and SEM analysis. The results indicated that the hydration characteristics of slag cement paste containing cement kiln dust 10% by mass were enhanced, especially at later ages (24 h) of hydration. That is due to the hydrothermal curing regimes of immobilized pastes accelerating hydration reactions and precipitation of CaCrO4, indicating that Cr (VI) can be solidified in the cement paste. This precipitation leads to pore formation in hydrated slag cement pastes.
format	Article
author	Shatat, M. R. Ali, Gomaa A. M. Tantawy, M. A.
author_facet	Shatat, M. R. Ali, Gomaa A. M. Tantawy, M. A.
author_sort	Shatat, M. R.
title	Hydration Characteristics and Immobilization of Cr (VI) in Slag Cement-CKD Pastes under Hydrothermal Treatment
title_short	Hydration Characteristics and Immobilization of Cr (VI) in Slag Cement-CKD Pastes under Hydrothermal Treatment
title_full	Hydration Characteristics and Immobilization of Cr (VI) in Slag Cement-CKD Pastes under Hydrothermal Treatment
title_fullStr	Hydration Characteristics and Immobilization of Cr (VI) in Slag Cement-CKD Pastes under Hydrothermal Treatment
title_full_unstemmed	Hydration Characteristics and Immobilization of Cr (VI) in Slag Cement-CKD Pastes under Hydrothermal Treatment
title_sort	hydration characteristics and immobilization of cr (vi) in slag cement-ckd pastes under hydrothermal treatment
publisher	Springer
publishDate	2015
url	http://umpir.ump.edu.my/id/eprint/14165/ http://umpir.ump.edu.my/id/eprint/14165/ http://umpir.ump.edu.my/id/eprint/14165/ http://umpir.ump.edu.my/id/eprint/14165/1/fist-2015-gomaa-Hydration%20Characteristics%20and%20Immobilization.pdf
first_indexed	2023-09-18T22:17:36Z
last_indexed	2023-09-18T22:17:36Z
_version_	1777415441957781504

Hydration Characteristics and Immobilization of Cr (VI) in Slag Cement-CKD Pastes under Hydrothermal Treatment

Similar Items